INVESTMENTS (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Investments
Fair Value	$ 41,777,736,000	$ 40,697,848,000
Cost	36,629,676,000	36,647,369,000
Investments pledged as direct collateral	2,100,000,000	2,100,000,000
Private Equity
Investments
Fair Value	34,495,418,000	34,114,623,000
Cost	27,701,310,000	28,336,315,000
Fixed Income
Investments
Fair Value	3,777,531,000	3,396,067,000
Cost	3,652,707,000	3,266,846,000
Real Assets
Investments
Fair Value	1,995,970,000	1,775,683,000
Cost	4,046,344,000	3,861,792,000
Equity Method
Investments
Fair Value	336,737,000	200,831,000
Cost	134,143,000	20,847,000
Other
Investments
Fair Value	1,172,080,000	1,210,644,000
Cost	$ 1,095,172,000	$ 1,161,569,000